Perishable dividing-plate.



F. W. STOGKER.

PBRISHABLE DVIDING PLATE.

APPLIOATION FILED oom-12, 1914.

1,1 31,872, Patented Mar. 16, 1915.

5 19a who@ :FLORIAN WILLIAM STOCKER, OF HOBOKEN, NEW JERSEY.

rnnIsHArLn marmitte-PLATE. l

Application :filed October 12, 1914.

2 '0 all 'whom t may concern Be it known that I, FLORIAN WILLIAM STOCKER, a citizen of the German Empire, and a resident of Hoboken, in the county of Hudson and State of New Jersey, have invented certain new and useful improvements in Perishable Dividing-Plates, of which the following is a specification.

This invention has reference to improve` ments in dividing plates for expansion joints for concrete curbing and the like and may also be used for sidewalk and other concrete work. Such dividing plates are usually of metal and temporarily inserted between two concrete sections. When 4the concrete attains its initial or final set the dividing plates are removed whereby a slot is created between two adjoining concrete sections which permits of their expansion and contraction.

Recognition of the necessity of providing certain means for securing delinite joints as a protection against possible damage to the concrete sections, due to expansion and contraction led to the use of these so called dividing plates. The dividing plates originally took the form of slotted metal strips, about of an inch thick. Some of those devices made of metal are held by long steel pins which provide a rigid, accurate and durable means for separating the concrete sections. Flexible strips may be used for curves of any desired radius and means for making the form and dividing plates a single unit are known.

Concrete curbing, sidewalks, concrete roads, etc., are laid in sections of suitable length and not continuously monolithic for several reasons: 1st. To accommodate eXpansion and contraction of theconcrete. 2nd. To guard against breaking and damage in case of settlement of the sub-structure. 3rd. To facilitate sectional construction without removing temporary obstructions in the right-of-way. rlhe usual method employed to accommodate the foregoing is the employment of steel, wood, or iron dividers, or as they are called dividing plates of suitable shapes and thickness which are set or placed at intervals. After their removal the open joint or space displaced by it is lled with sand or other suitable material.

The disadvantages of this method are clearly shown when the following is considered: 1st. It is bad policy to leave the Specication of Letters Patent.

Patented Mar.. i6, 1915.

serial No. 866,207.

plates in position until the concrete has attained its initial or final set, as it may bond together. The removal of the plates then certainly becomes at times dangerous and troublesome. 2nd. The premature removal of the plates often destroys all edges which have to be replaced after the forms are stripped. 3rd. It prevents a continuous uninterrupted operation and saving of labor as the forming as well as the filling of the joints with the filler, can only be made after the concrete has become suiiiciently hard or set.

It is the purpose of the present invention to overcome the described defects and to produce what I term perishable dividing plates which deteriorate under atmospheric influences and crumble up so as to allow of expansion and contraction of the concrete sections and the narrow opening formed by the deterioration of the perishable plate will be filled up gradually by dirt or dust which settles therein. Thus the novel dividing plates which are perishable will be applied between the concrete sections and will remain therein so that no removal is necessary whereby time and wages are saved. To attain this purpose the perishable plates consist of an organicsubstance such as saw dust, wood meal and the like, a mineral substance such as common sand, and a glutinous binding material such as water soluble glue, gum tragacanth or the like. The proportions in which such Inaterials are mixed may vary according to the time they are intended to stand and according to the atmospheric condition prevailing in certain regions. The saw dust or wood meal, for instance, is mixed with some fine sand and some powdered glue and the perishable plates are pressed into shape of the desired size. The surfaces of each plate are treated with an oily substance to prevent bonding with the concrete. Each plate may be made of one or more layers which are pressed or joined together to attain sufficient strength or stiffness. A perishable plate thus produced is sufliciently strong to act as a dividing plate and elastic enough in itself to accommodate expansion and contraction; in the course of time, however, by atmospheric influence and action it will deteriorate and leave the desired joint. |The glutinous substance is dissolved and the sand and saw dust settle in loose form. The

joint orslot naturally Iillsup by dirt or dust; thereby `accomplishing all that is desired.

In order t'o render the invention' entirely clearreference is had to the accompanying drawing in which:

Figure l, represents in perspective view two sections of concrete with a perishable plate between them. Fig. 2,. is a partial front view of the same on an enlarged scale. Fig; 3, illustrates in perspective view: aperishable dividing plate. Fig. 4, `is a similar ,view of. a somewhat niodiiedplate. Fig. 5, is a sectional view of a concrete section with curb protector therein. section, online 6-6-of Fig. 2. Fig. 7is a similar View of lineY--T` of Fi'g-2. Fig. 8 shows in perspective view an auXiliarymemyber for setting the curbprotectorson both sides ofthe perishable plates.

Similar characters o'f referenceV denote likegparts in` all. the kiigures.

In F" g. l of the drawing a, b, are two-concrete sections between lwhich a vertical This incision` ory slot' is required on account .oi''wthecurbbarsi or'protectors; YIii order t0 .prevent any: tilting-motion of" thecurb bars amopen-shell` gy is inserted vini/the `joint as shown indotted linesinrFig. 2, inrsection in Eig. `6: and in perspective view on an enlargedscale in Fi'g. l`S. This shell passes Y through the; slot :inthe `perishable plate eX- tending beyond the vsame on both.- sides andl when; they curb bars are-inserted under an angleroff 459- the'innerf-endsY of their webs Z1 rest inthe shell/and the inn-er endslof' their heads, shieldsor fnosings bearagainst the Fig. 6, is a` cross dividing-plate c is inserted. Each, concrete The perishable vpterial.

3.. A perishable; dividingjplate 'efor anexp ansion oint :for uconcrete,l structures 4andi the like composed of'fparticlesroiia deteriorating organic material, .Y a; finely divided mineral substance, and 'a *glutinousf organic binding material.

4. A perishable i dividing plateori an eX- 'pansion joint `for'concretecurbingand the like composed@ offparticles ofi. a deteriorating organic 'materiah 'a 'iinely divided mineral substance', and: Va water solubleiglutinous binding material.

5. In Fconcrete curbing, sidewalks, roads and the like laid iny sections,fa perishable Adividinglplate composed offaa deteriorating organic substance, a finely dividednmineral substance` anda gluti'nous organic .binding material, `said perishable lplatelbein'g `interposed between two adjoining concrete sectionsl and remaining 'therein.

6. In concrete curbing, sidewalksand'the like -laid infsections, a permanentgperishable dividing :plate composed ofi a deteriorating organic substance, .as Afinely divided mineral substance, and: aaglutin'ous Vorganic binding material, said! perishable plate ih'avingf oiledA `surfaces to prevent bondingl 'with rth'e concrete.

'Signed at NewYorkVN. Y., this'lst day of: lctober,l 19,14." j

F. WILLIAM STOCKFJR'.

Witnesses: A j

WILLIAM T. BERNHART, CHARLOTTE E. KIRCHNER:

V(1' p1cr.of.1:1iis. patent-.maybe attained for ivey cents each, .by'addressingl the @Commissioner.of';1atentg Washington; D 

